Rolling mill



Apn'l 7, 1925.

G. J. MURPHY ROLLING MILL Filed llay 31, 1924 ATTORNEYS. v

, WITNESSES Patented Apr. 7, 1925.

' UNITED STATES GEORGE J. MURPHY, or BUENos Areas, A GENi r U-u nominve MIL Application filed May 31, 1924. 7 Serial No. 717,041.

To 77 whom it may concern:

Be it known that I, GEORGE J. MURPHY, a citizen of Irish Free State, and resident-oi liaradero, F. C. C. A., Buenos Aires, Argentina, South America, have invented a new and Improved Rolling Mill, of which the following is a description.

My invention relates to a rolling mill and particularly to a mill adapted to roll rail way rails of a special form,-said rails forming part of the subject-matter of'United States Letters Patent, No. 1,365,941, granted to me January 18, 1921. Said railway rails, in order to contribute to the making of a novel railway joint disclosed in my mentioned patent, are given a terminal conformation to present an overlappingportion adapted to be disposed alongside the web of an adjacent rail and lying for the major portion beneath the head of the rail,a zone of the overlappingterminal adjacent the inner end or base thereof being of a height to lie flush with the top of the rail head. Said overlapping portion furthermore has a base flange broadened beyond the width of the base flange throughout the major portion of the rail. Also, the rail'at and adjacent to the overlapping portion is formed with a web of increased thickness. I

Thorolling mill constituting my present invention has for its object to provide a. roller assemblage of such a character that a bar, rod, or partly finished blank may be entered between the rolls at an end thereof and be caused to shift laterally lengthwis of the rolls as the blank passes between the rolls, thelengths ofthe rolls being such as to convert the bar into a plurality of united rails ready to be cut to form the individual rails.

The nature of my invention and its dis tinguishing features and advantages will clearly appear as the description proceeds.

Reference is to be had to the accoi'npanying drawings forming a part of this specification, it being understood that the draw-- ings are merely illustrative of one example of the invention.

Figure 1 is a side elevation of arolling mill embodying my invention;

Figure 2 is a diagrammatic view of the rolls from that end adjacent to which the blank is introduced, the view including a diagram of the bar or rod produced by the rolls;

the rolls between the 'ends;..

Figure 3 is a diagrammatic view. of one of Figures 4, 5 and 6 'are cross sections through the blank and showing theformation of the rolls to prodncethe different portions of the rail, theplanes of the sections being indicatedby. the lines ,44, and (36, respectit' ely, Figure 2.

' In carrying-out invention in accord! ance with the illustrated example, two rolls 10 are provided on shafts 11, 12, of: which the former may be considered the driveshaft and in practice having any suitablewmea'ns (not shown) for driving the-shaftg-The shafts are journaled in standards 13 rising from a suitable base 14C... The rolls are formed each with spiral ribs 15, the'ribs of the respective rolls contacting. with each other. Th'e rolls present continuous spiral grooves 115 conforming generally to the rail cross section and having members alongthe grooves to produce the said formationof the rails at the end'portions. A rod is showndiagrammatically in Figs ure 2, the numeral 16 representing the base flange at the normal-cross section of the rail; 17, the Webat thenormal cross section; 117, the thickened Web portion; and 18, the normal rail head. I The flange is" broadened at the terminal of "the rail-,[as at 19, Figure 2. Also, members 20 of-redu'ced width-are produced in the bar or blank to form the overlapping terminals, said overlapping terminals having at thej'base thereofg-asat 21, increased dimensions'to rise 'tofthe height of thera'il head l8. W

- The spiral groove presents a spiral rib 22 to depress the" blank fed to the rolls atthe opposite sides for producing the web ofthe' rail. At one side of the rib 22 is a spiral groove 23 to produce the base formation of the railand at the opposite side of saidiri'b 22 is a spiral groove 24 of a'forin to pro duce the rail head. The rolls, have a length to produce on a semi-formed bar or blank a plurality of connected and integral rail portions so that the finished bar requires only to be cut off to produce on the individual rail lengths the overlapping portion 20 of the required length. At the end ofthe subdivision of the rolls resulting in the formation of an individual rail portion in the blank is an arcuate rib 25 extending radially beyond the normal peripheryof the rolls, that is to say, beyond the contacting rib15 of that roll. Similarly, in the mating roll is an arcuate depression 26 materially Wider than the rib 25 with which it coacts.

The depression 26 as shown in Figure 4 has such dimensions in cross section as to permlt the rib 25 to press the widened railbase or flange 19 intothegroove and give the base flange the desired angularity relatively to the Web at the overlapping part 20. At the base of the rib 25, there is an arcuate rib 27 of less radius but of greater length which is adapted to enter and partially fill the'general spiral groove 115 between the spiral ribs 'of the mating roll. The depression 26 is complementary to the general groove 115, as clearly shown in Figure 4. At the terminals of each arcuate rib 25, there are auxiliary rib portions 28 of less radius than ribs '25 andso related to the adjacent portionsof the groove 115 and to the v rib portions and 27, as toproduce the higherportions 21 along the blank.

In operatiomthe partially finished blank is fed at that end of the rolls Which is the right in Figure 1. The spiral ribs 15 and grooves 115 cause the partially finished blank to shift laterally, that is, longitudinally of the rolls as the blank is fed through the rolls; after thexarcuate projecting rib portions 25 have acted upon the rail to bend down the flange at the base of the portion 20 the normal cross section of the-blank isagain reached and another .com pleterail' portion formed, thus the blank has produced thereon a series of connected integral rail portions requiring only to be cut at the center of that portion of the b-lankor rod having the members 20. .Thusa singlet OPGIHUOH of the rolls after the partial formation of the blank rods suffices .to produce'a series of cona nected rail portions to correspond with the rail referred to. p I v i v I Would statein conclusion that While the illustrated example constitutes a practical embodiment of my invention, I do not limit myself strictly to the mechanical details herein illustrated, since, ,manifestly,. the same can be considerably varied Without departure from the spirit of the invention as defined in the appendedclaims.

. Havi11g thus, described my invention, I

claim: i 1. A rolling mill including a pair of rolls having contacting spiral ribs and alternat-,

ing spiral grooves, said rolls at said grooves having a cross section to roll from a blank rod, a railjhaving at portions thereof the normal cross section of a rallroad rail, and

members along the grooves at intervals ,to'

produce joint members of reduced height and Width at the ends of the normal cross section of the rail.

2. A rolling mill including a pair of rolls having contacting spiral ribs and alternating spiral grooves, said rolls having at portions of the grooves co-actmg members to produce. on a blank rail, portions of normal crosssection and having at intervals members to produce alternating with the portions of normal cross section, portions of normal cross section having a reduced height and Width to constitute when out overlapping terminal rail portions.

8. A rollln mill includin a 32111 of rolls b J b havmg contacting sp ral ribs and alternating spiral grooves, said rolls having on portions thereof along the grooves, co-acting members to produce on the blank rail portions of normal cross section; together With I members along the grooves to, produce rail portions of reduced height and Width at the ends of the normal cross section as well as members to produce on the blank at the said portions of reduced height and Width, members to produce portions of less Width than the normal but of the full, height of the rail portions of normal cross section.

.1 4. A rolling mill including a pair of rolls having contacting spiral ribs and 'alternating spiral grooves, said rollshaving along portions thereof at the grooves, co-acting members to produce on the blank railportions of normal cross section; together With members along the grooves to producerail portions of reduced height and Width at the ends of the normal cross section as ell as membersto,produce on the blank at the said portions of reduced height and Width, 

